18206868 has 12 divisors (see below), whose sum is σ = 42482720. Its totient is φ = 6068952.

The previous prime is 18206863. The next prime is 18206887. The reversal of 18206868 is 86860281.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18206863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 758608 + ... + 758631.

Almost surely, 2^18206868 is an apocalyptic number.

It is an amenable number.

18206868 is an abundant number, since it is smaller than the sum of its proper divisors (24275852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18206868 is a wasteful number, since it uses less digits than its factorization.

18206868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517246 (or 1517244 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 18206868 is about 4266.9506676314. The cubic root of 18206868 is about 263.0742945759.

The spelling of 18206868 in words is "eighteen million, two hundred six thousand, eight hundred sixty-eight".